Palynological evidence for sustained deep-marine conditions during the Eocene–Miocene in the southern Gulf of Mexico distal continental margin

Barron, A.J.M.; Zobaa, Mohamed K.; Oboh‐Ikuenobe, Francisca E.

doi:10.1130/b31559.1

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…Apart from Holocene palynological studies (e.g. Correa-Metrio et al 2011;Arag on-Moreno et al 2012), the only publications on the palynology of the Yucat an Peninsula are based on Deep Sea Drilling Project (DSDP) Site 94 on the Campeche escarpment, where a late Eocene to early Miocene pollen assemblage was recovered (Barron 2015;Barron et al 2017). During the Cretaceous, the Yucat an Peninsula was part of the Aquilapollenites province (Herngreen et al 1996;Vajda and Bercovici 2014), characterized by abundant representatives of the morphologically distinctive Aquilapollenites pollen group.…”

Section: Introductionmentioning

confidence: 99%

Paleocene–Eocene palynomorphs from the Chicxulub impact crater, Mexico. Part 2: angiosperm pollen

et al. 2020

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At the end of the Cretaceous Period, an asteroid collided with the Earth and formed the Chicxulub impact structure on the Yucat an Platform. International Ocean Discovery Program (IODP) Expedition 364 drilled into the peak ring of the Chicxulub impact crater. The post-impact section of the core was sampled for terrestrial palynological analysis, yielding a high-resolution record ranging from the early Paleocene to the earliest Eocene (Ypresian), including a black shale deposited during the Paleocene-Eocene Thermal Maximum (PETM). The IODP 364 core provides the first record of floral recovery following the K-Pg mass extinction from inside the Chicxulub impact crater. The systematic taxonomy of the angiosperm pollen provided here follows a separate publication describing the systematic paleontology of the plant spores and gymnosperm pollen from the IODP 364 core (Smith et al. 2019). The Paleocene section of the core is nearly barren, but with unusually high relative abundances of the angiosperm pollen Chenopodipollis sp. A (comparable to the Amaranthaceae), possibly indicating an estuarine pollen source. Pollen recovery is higher in the PETM section, and variable but generally increasing in the later Ypresian section, with excellent preservation in several samples. Estimated absolute ages of several potentially useful regional biostratigraphic events are provided. One new genus (Scabrastephanoporites) and five new species (Brosipollis reticulatus, Echimonocolpites chicxulubensis, Psilastephanocolporites hammenii, Scabrastephanoporites variabilis, and Striatopollis grahamii) are formally described.

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Section: Introductionmentioning

confidence: 99%

Paleocene–Eocene palynomorphs from the Chicxulub impact crater, Mexico. Part 2: angiosperm pollen

et al. 2020

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“…In the present day ~90 different Quercus species are found in North America, of which ~35 species are present in eastern North America (eFloras, 2008). Modern oak lineages became established during the early Paleogene (Barrón et al, 2017), for which the first unequivocal fossil evidence in North America is from Oregon (late early Eocene; Manchester, 1994Manchester, , 2011. A palynofloristic record from southern Mississippi and Alabama (Oboh and Reeves Morris, 1994;Oboh et al, 1996) revealed that oaks became dominant around the Eocene-Oligocene boundary in southeastern North America.…”

Section: Paleofloristic Composition With Special Reference To the Gen...mentioning

confidence: 99%

New Jersey's paleoflora and eastern North American climate through Paleogene–Neogene warm phases

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et al. 2020

Review of Palaeobotany and Palynology

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“…and White 2008). Gleicheniidites senonicus has been identified from Eocene strata in Deep Sea Drilling Project (DSDP) Site 94 along the Campeche Escarpment (Barron 2015;Barron et al 2017).…”

Section: Genus Echinatisporis Krutzsch 1959mentioning

confidence: 99%

Palaeocene–Eocene miospores from the Chicxulub impact crater, Mexico. Part 1: spores and gymnosperm pollen

et al. 2019

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In the summer of 2016, the International Ocean Discovery Program (IODP) Expedition 364 cored through the post-impact strata of the end-Cretaceous Chicxulub impact crater, Mexico. Core samples were collected from the post-impact successions for terrestrial palynological analysis, yielding a rare Danian to Ypresian high-resolution palynological assemblage. This record constitutes one of the first Palaeocene and Ypresian palynological assemblages from Central America or Mexico, representing a more coastal lowland palaeoenvironment than previous studies from mainland Mexico. Although the abundance of pollen and spores is very low in the Palaeocene carbonates, abundance increases in the more organic-rich shale layers representing the Palaeocene-Eocene Thermal Maximum (PETM) and later Ypresian. The spores and gymnosperm pollen identified from IODP 364, although rare compared to the angiosperm pollen, are a diverse mix of cosmopolitan taxa, as well as some characteristic of fossil Central American assemblages (e.g. Selaginellaceae), and others previously identified from the Paleogene northern Gulf of Mexico coastal plain. The assemblage generally indicates the presence of nearby moist to seasonally dry lowland tropical forest, with some taxa suggestive of higher elevation forests. Ephedroid pollen grains may be indicative of the presence of more arid conditions.

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Palynological evidence for sustained deep-marine conditions during the Eocene–Miocene in the southern Gulf of Mexico distal continental margin

Cited by 6 publications

References 29 publications

Paleocene–Eocene palynomorphs from the Chicxulub impact crater, Mexico. Part 2: angiosperm pollen

Paleocene–Eocene palynomorphs from the Chicxulub impact crater, Mexico. Part 2: angiosperm pollen

New Jersey's paleoflora and eastern North American climate through Paleogene–Neogene warm phases

Palaeocene–Eocene miospores from the Chicxulub impact crater, Mexico. Part 1: spores and gymnosperm pollen

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